From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-14.0 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,T_DKIMWL_WL_HIGH, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D0461C072B1 for ; Thu, 30 May 2019 03:40:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AA8E924BC2 for ; Thu, 30 May 2019 03:40:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1559187617; bh=d03wGcSLh8G/HpcgAyBKycnljy+lMikE51SomgRCph0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=PgtA+pDnElmyt+t14PVAcbxBwjeN90WCONK/7qfEN5yXo3xSq8OEdpLplUl1biGb+ pWN/QaYUTN25ZNouyE25sW8+xzp8Wy1A71/KGBrFZOQcBWgiHl4A2PcEeaDSVnFX6d eKNquLkzwHnoHpi2abAFBX4BAnuEyLnbWg4+s0+w= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727548AbfE3DkN (ORCPT ); Wed, 29 May 2019 23:40:13 -0400 Received: from mail.kernel.org ([198.145.29.99]:34986 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732585AbfE3DV3 (ORCPT ); Wed, 29 May 2019 23:21:29 -0400 Received: from localhost (ip67-88-213-2.z213-88-67.customer.algx.net [67.88.213.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D3E0224A15; Thu, 30 May 2019 03:21:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1559186488; bh=d03wGcSLh8G/HpcgAyBKycnljy+lMikE51SomgRCph0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=a8fbKN8rY6FrlR7vR4dCY4YPj3Fs1BDsy4aqonGbvbuMHLcRScQAK2sTTv8rKLWAy 57RvtCPqVat3zQD7IiZ6qTw87czDkTj2SxMqqkr3XTlLEsYLDfABbAdQ38fgi4kQgw 4pCEBTNsGvvVXnuqdZe9VRYsbsVASCkhDhNLNBMM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Nathan Chancellor , Nick Desaulniers , Jonathan Cameron , Sasha Levin Subject: [PATCH 4.9 091/128] iio: common: ssp_sensors: Initialize calculated_time in ssp_common_process_data Date: Wed, 29 May 2019 20:07:03 -0700 Message-Id: <20190530030451.119446450@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190530030432.977908967@linuxfoundation.org> References: <20190530030432.977908967@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org [ Upstream commit 6f9ca1d3eb74b81f811a87002de2d51640d135b1 ] When building with -Wsometimes-uninitialized, Clang warns: drivers/iio/common/ssp_sensors/ssp_iio.c:95:6: warning: variable 'calculated_time' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized] While it isn't wrong, this will never be a problem because iio_push_to_buffers_with_timestamp only uses calculated_time on the same condition that it is assigned (when scan_timestamp is not zero). While iio_push_to_buffers_with_timestamp is marked as inline, Clang does inlining in the optimization stage, which happens after the semantic analysis phase (plus inline is merely a hint to the compiler). Fix this by just zero initializing calculated_time. Link: https://github.com/ClangBuiltLinux/linux/issues/394 Signed-off-by: Nathan Chancellor Reviewed-by: Nick Desaulniers Signed-off-by: Jonathan Cameron Signed-off-by: Sasha Levin --- drivers/iio/common/ssp_sensors/ssp_iio.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/common/ssp_sensors/ssp_iio.c b/drivers/iio/common/ssp_sensors/ssp_iio.c index a3ae165f8d9f3..16180e6321bd4 100644 --- a/drivers/iio/common/ssp_sensors/ssp_iio.c +++ b/drivers/iio/common/ssp_sensors/ssp_iio.c @@ -80,7 +80,7 @@ int ssp_common_process_data(struct iio_dev *indio_dev, void *buf, unsigned int len, int64_t timestamp) { __le32 time; - int64_t calculated_time; + int64_t calculated_time = 0; struct ssp_sensor_data *spd = iio_priv(indio_dev); if (indio_dev->scan_bytes == 0) -- 2.20.1